Bitterness, saltiness, and sourness could not be detected by the tip of the tongue
A desert is a hot wasteland covered with sand and a tundra is a frozen wasteland covered in ice
A) is your best answer.
Relative Dating gives the 'relative dating', which allows one to find the difference of age between many different of fossils. However, radioactive dating is used to get a more exact measurement of a fossil, but it can only be used for certain types of fossils.
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